diff options
Diffstat (limited to 'theories/Arith/Div2.v')
| -rw-r--r-- | theories/Arith/Div2.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/Arith/Div2.v b/theories/Arith/Div2.v index 47e66e5b7..1f8d13973 100644 --- a/theories/Arith/Div2.v +++ b/theories/Arith/Div2.v @@ -169,12 +169,12 @@ Hint Resolve even_double double_even odd_double double_odd: arith. Lemma even_2n : forall n, even n -> {p : nat | n = double p}. Proof. intros n H. exists (div2 n). auto with arith. -Qed. +Defined. Lemma odd_S2n : forall n, odd n -> {p : nat | n = S (double p)}. Proof. intros n H. exists (div2 n). auto with arith. -Qed. +Defined. (** Doubling before dividing by two brings back to the initial number. *) |